Re: [Qemu-devel] [PATCHv2] virtio-pci: add MMIO property
From: Paul Brook <hidden>
Date: 2012-03-20 16:32:23
quoted hunk ↗ jump to hunk
@@ -682,10 +733,18 @@ void virtio_init_pci(VirtIOPCIProxy *proxy,VirtIODevice *vdev) if (size & (size-1)) size = 1 << qemu_fls(size); + proxy->bar0_mask = size - 1;
You'll get better performance if you use page-sized mappings. You're already creating a mapping bigger than the actual data (rounding up to power-of-two), so you may as well pick a value that's convenient for qemu to map into the address space. Paul